SpiderPig is a project created for performing and visualizing data flow analysis of a selected binary program. SpiderPig was created in the purpose of providing a tool which would be able to help vulnerability and security researchers with tracing and analyzing any necessary data and it's further propagation. Such tasks are very often crucial in the vulnerability discovering/identifying process and typically require a lot of time consuming manual work. Following paper discusses methods and techniques implemented in SpiderPig in order to perform semi-automatic data flow analysis.